This example illustrates better than the Baffin Island kayak the combination of deep forefoot and the greatest beam well abaft the midlength that marks many eastern models. When paddled, the craft always trims so that the kayak draws most water at the fore end of the keelson and the bottom of the stern is usually just awash. This makes the bottom sweep up from the forefoot in a very slight gradual curve to the stern, when the boat is afloat. As a result, the kayak may be said to be of the "double-wedge" form that has been popular in fast low-powered motor boats, since having the beam far aft gives to the bow a wedge shape in plan, while the deep forefoot and shallow stern produce an opposite wedge in profile. It would appear that this form had been found by trial and error to produce a fast, easily paddled rough-water kayak in an otherwise heavy hull. The North Labrador kayaks are the largest in the Arctic for a single person; some are reported as long as 26 feet. The long-and narrow-bladed paddle may be explained by the fact that the Eskimo never produced a "feathered" double paddle, with blades set at right angles to one another. To paddle against strong winds, he developed a blade that was very long and very narrow for a double-paddle, and therefore offered less resistance to the wind, yet could be dipped deep so that little propulsion effect was lost. The kayak used on the northeast coast of Labrador, shown in figure 198, differs slightly from that of Hudson Strait. The northeast-coast kayak has a very slight ~V~-bottom and a strong concave sheer with relatively great rocker in the bottom. While the craft trims by the bow afloat, the rocker probably makes it more maneuverable than the Hudson Strait kayak, though less easily paddled against strong winds. The ~V~-bottom is formed by using a keelson that is heavier and deeper than the chines. The latter are thin, wide battens, on the flat. The V-bottom appears to help the boat run straight under paddle and may be said to counteract, to some extent at least, the effect of the strongly rockered bottom. The Polar coast of Greenland is the home of sharpie-model kayaks having flat bottoms and flaring sides; the kayaks in figures 199 and 200 are representative of those used in the extreme north. These have "clipper" bows, with sterns of varying depth and shape, concave sheer and varying degrees of rocker in the bottom. Most have their greatest beam well aft and draw more water forward, as do the Labrador and Baffin Island types. The chief characteristic of the construction of this type is that the transverse frames are in three parts, somewhat as in the umiak. However, these kayaks depart from umiak construction in having the frame heads rigidly tenoned into the gunwales. This is done to give the structure a measure of transverse rigidity which would otherwise be lacking, since light battens are used for the keelson, stem, and chines. Figure 199 shows the details of the construction used.